I am considering buying a new Volvo V90. I have read numerous reviews and had a test drive. I note that in addition to the standard suspension set-up there are two (cost) options available - rear self-levelling electronic air suspension and active four-c chassis four corner adaptive dampers with rear electronic air suspension. The car I test drove did not have either option fitted. Is it worth specifying either of these options? The car will be used as a family wagon and will have a mix of urban, suburban and motorway driving. In addition, three or four times a year it will be fully loaded (two adults, two teenage children, dog, boot and roof box full).